Part 1: Plumb render view ID to render host

content/renderer/media/audio_output_ipc.cc

Index: content/renderer/media/audio_output_ipc.cc
diff --git a/content/renderer/media/audio_output_ipc.cc b/content/renderer/media/audio_output_ipc.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e12598a773906828bbe72b618f2f764ef6dffc9b
--- /dev/null
+++ b/content/renderer/media/audio_output_ipc.cc
@@ -0,0 +1,53 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "content/renderer/media/audio_output_ipc.h"
+
+#include "content/common/media/audio_messages.h"
+#include "content/renderer/media/audio_message_filter.h"
+
+AudioOutputIPC::AudioOutputIPC(int render_view_id)
+    : render_view_id_(render_view_id) {
+}
+
+AudioOutputIPC::~AudioOutputIPC() {
+}
+
+int AudioOutputIPC::AddDelegate(media::AudioOutputIPCDelegate* delegate) {
+  return AudioMessageFilter::Get()->AddDelegate(delegate);
+}
+
+void AudioOutputIPC::RemoveDelegate(int id) {
+  AudioMessageFilter::Get()->RemoveDelegate(id);
+}
+
+void AudioOutputIPC::CreateStream(int stream_id,
+    const media::AudioParameters& params) {
+  Send(new AudioHostMsg_CreateStream(render_view_id_, stream_id, params));
+}
+
+void AudioOutputIPC::PlayStream(int stream_id) {
+  Send(new AudioHostMsg_PlayStream(render_view_id_, stream_id));
+}
+
+void AudioOutputIPC::PauseStream(int stream_id) {
+  Send(new AudioHostMsg_PauseStream(render_view_id_, stream_id));
+}
+
+void AudioOutputIPC::FlushStream(int stream_id) {
+  Send(new AudioHostMsg_FlushStream(render_view_id_, stream_id));
+}
+
+void AudioOutputIPC::CloseStream(int stream_id) {
+  Send(new AudioHostMsg_CloseStream(render_view_id_, stream_id));
+}
+
+void AudioOutputIPC::SetVolume(int stream_id, double volume) {
+  Send(new AudioHostMsg_SetVolume(render_view_id_, stream_id, volume));
+}
+
+bool AudioOutputIPC::Send(IPC::Message* message) {
+  return AudioMessageFilter::Get()->Send(message);
+}